| Uranyl Platinocyanide is formed by double decomposition between barium platinocyanide and uranyl sulphate. If the solution is crystallised at ordinary temperature, red crystals with strong green metallic reflexion are deposited; but if the solution is evaporated on a water-bath, yellow crystals separate, which turn reddish green on cooling. The latter product changes back to the yellow form at 39° C. The two forms probably represent different degrees of hydration. Unlike most uranyl salts, the platinocyanide does not fluoresce. |